Using acoustic telemetry to locate flatfish spawning areas: Estuarine migrations of turbot Scophthalmus maximus and European flounder Platichthys flesus

Estuaries are complex environments that provide important nursery areas for several fish species, but anthropogenic activities as well low salinities may affect reproductive potential. This study investigated spawning migrations of turbot (Scophthalmus maximus) and European flounder (Platichthys flesus) in the estuary Roskilde Fjord using acoustic telemetry. For turbot, migratory behaviour was coupled with salinity measurements to estimate likelihood successful spawning. Turbot inRoskilde stocked fish, whereas represents a naturally occurring population. Telemetry data suggested two species exhibited different migration behaviours towards season. The indicates they remain southern parts where development eggs larvae be limited by salinity. In contrast, majority migrated more marine waters prior season, only minority remained inside during Consistent previous studies, present results indicate perform partial migration. Thus, utilize diversity areas, including brackish elevated salinities. Our future management recruitment dynamics selection suitable populations stocking.